<html>
<head>
    <!--The instant the script is run, a new class is attached to the <html> element
            giving us the ability to know if Javascript is enabled, or not.-->
    <script>document.documentElement.className = "js";</script>

    <!--If Javascript is enabled, hide the block of text, which we will fade in later.-->
    <style>.js #fadein { display: none }</style>
</head>
<body>
    <div id="fadein">Block of stuff to fade in…</div>
</body>
</html>
